WT "this generation" teaching stands valid based on the definition of generation as wt applies the definition to the 2 annointed groups. And that's that. Fisherman:
indeed, and that will have the overlapping group lapse by about 2075. Mark David Splan's words.
In addition to the wt definition there are of course these pesky bible facts about them:
1) there is more to spiritual Israel's tribes then the marked 144k, (they come out of them)
2) they are male virgins, not surprising, their sponsor, Jesus was too.
3) they have to die a sacrificial death, axed, literally. No euthanasia, morphine-eased slipping away here. Rev. 20
4) they can not pass away until all things have occurred.
wt has always played wild and loose with bible facts. always came back to bite them later. All of Deutr. 18 is yet to be fully applied.